package com.znz.analysis.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import com.znz.analysis.constant.enumeration.HttpMethod;

import net.sf.json.JSONObject;

/**
 * @author 作者 :TP
 * @version 创建时间：2017年6月21日 上午10:21:40
 *
 */
@Component
public class HttpRequest {

	private Logger logger = Logger.getLogger(HttpRequest.class.getName());

	/**
	 * 向指定URL发送GET方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	@SuppressWarnings("unchecked")
	public String sendGet(String url, String param, Map<String, String>... headers) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url;
			if (param != null) {
				urlNameString = url + "?" + param;
			}
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			// connection.setRequestProperty("Accept-Language",
			// "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");
			// connection.setRequestProperty("Accept-Encoding",
			// "gzip, deflate");
			connection.setRequestProperty("Content-Type", "text/html;charset=utf-8");
			connection.setRequestProperty("accept", "*/*");
			// connection.setRequestProperty("Accept",
			// "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			if (headers != null && headers.length > 0) {
				for (Map<String, String> header : headers) {
					for (String key : header.keySet()) {
						connection.setRequestProperty(key, header.get(key));
					}
				}
			}
			// 建立实际的连接
			connection.connect();
			connection.setConnectTimeout(5000);
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection.getInputStream(), Charset.forName("utf-8")));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
				line.getBytes();
			}
		} catch (Exception e) {
			logger.error("发送GET请求出现异常！", e.getCause());
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 json 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	@SuppressWarnings("unchecked")
	public String sendJson(String url, JSONObject param, HttpMethod method, Map<String, String>... headers) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestMethod(method.toString());
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			conn.setRequestProperty("Content-Type", "application/json");
			if (headers != null && headers.length > 0) {
				for (Map<String, String> header : headers) {
					for (String key : header.keySet()) {
						conn.setRequestProperty(key, header.get(key));
					}
				}
			}
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setConnectTimeout(5000);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), Charset.forName("utf-8")));
			// 发送请求参数
			if (param != null) {
				out.write(param.toString());
			}
			// flush输出流的缓冲
			out.flush();

			in = new BufferedReader(new InputStreamReader(conn.getInputStream(), Charset.forName("utf-8")));

			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (SocketException e) {
			logger.error("发送" + method.toString() + "请求地址连接失败,请确认服务器地址！", e);
		} catch (Exception e) {
			logger.error("发送" + method.toString() + "请求出现异常！", e);
		}
		// 使用finally块来关闭输出流、输入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				logger.error("发送" + method.toString() + "请求出现异常！", ex.getCause());
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 * @throws UnsupportedEncodingException
	 */
	public String sendPost(String url, String param) throws UnsupportedEncodingException {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setConnectTimeout(5000);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), Charset.forName("utf-8")));
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();

			in = new BufferedReader(new InputStreamReader(conn.getInputStream(), Charset.forName("utf-8")));

			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			logger.error("发送POST请求出现异常！", e.getCause());
		}
		// 使用finally块来关闭输出流、输入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				logger.error("发送POST请求出现异常！", ex.getCause());
			}
		}
		if (result.contains("\\\\")) {
			result = result.replaceAll("\\\\", "\\");
			byte[] bt = result.getBytes("utf-8");
			result = new String(bt, "utf-8");
		}
		return result;
	}

	/**
	 * 检测指定ip 是否连通
	 * 
	 * @param ipAddress
	 *            指定的的 ip
	 * @param timeOut
	 *            超时时间
	 * @return 当返回值是true时，说明host是可用的，false则不可
	 */
	public boolean isIpReachable(String ipAddress, int timeOut) {
		boolean isReachable = false;
		String ip = ipAddress;
		InetAddress address;
		try {
			if (ipAddress.contains(":")) {
				ip = ipAddress.split(":")[0];
			}
			address = InetAddress.getByName(ip);
			isReachable = address.isReachable(timeOut); // 当返回值是true时，说明host是可用的，false则不可。
		} catch (Exception e) {
			e.printStackTrace();
		}
		return isReachable;
	}

}
